KR20110075901A - Braking pressure control method for disc brake system - Google Patents
Braking pressure control method for disc brake system Download PDFInfo
- Publication number
- KR20110075901A KR20110075901A KR1020090132473A KR20090132473A KR20110075901A KR 20110075901 A KR20110075901 A KR 20110075901A KR 1020090132473 A KR1020090132473 A KR 1020090132473A KR 20090132473 A KR20090132473 A KR 20090132473A KR 20110075901 A KR20110075901 A KR 20110075901A
- Authority
- KR
- South Korea
- Prior art keywords
- pressure
- brake
- wheel cylinder
- control unit
- abs
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/17—Using electrical or electronic regulation means to control braking
- B60T8/171—Detecting parameters used in the regulation; Measuring values used in the regulation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
- B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
- B60T11/16—Master control, e.g. master cylinders
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2400/00—Special features of vehicle units
- B60Y2400/30—Sensors
- B60Y2400/306—Pressure sensors
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Regulating Braking Force (AREA)
Abstract
The present invention provides a brake pressure control device for a disc brake that can block the supply of pressure to the wheel cylinder when the brake pad is excessively worn to improve braking stability, and to prevent the brake pedal from being deteriorated. A pressure sensor for sensing pressure of each wheel cylinder and master cylinder; When the pressure difference between each wheel cylinder and the master cylinder sensed by the pressure sensor is compared with a reference value, and the ABS brake is activated or not, the difference is greater than the reference value and the ABS brake is not operated. And a control unit for applying a control signal to the hydraulic unit to block the pressure supply to the wheel cylinder.
Description
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc brake of a vehicle, and more particularly, to a braking pressure control device for a disc brake that improves braking stability by blocking a braking pressure supplied to a wheel cylinder when the brake pad is excessively worn.
Disc brake of a conventional vehicle is a caliper housing (1) and the caliper housing (1) having an oil passage connected to the brake booster while being attached to the knuckle spindle is typically made of a cast iron material saddle shape as shown in FIG. Wheel cylinder (2) formed in the inside of the cylinder, the piston (3) for reciprocating movement by receiving hydraulic pressure through the wheel cylinder from the inside of the wheel cylinder (2), and receives the pressing force of the piston (3) to move the brake The
In the conventional brake disc structure as described above, the brake pad repeatedly contacts the rotating disc by the operation of the driver's brake pedal to generate a braking force with the friction force generated at that time, thereby causing wear due to repeated use of the brake. do.
As described above, when the brake pad is excessively worn due to repeated use of the brake and the thickness thereof becomes too thin, the required hydraulic pressure in the wheel cylinder increases, which also lowers the braking pressure of another wheel cylinder in which normal operation is possible. There was a defect that the braking distance was extended or the severe braking failure could be caused.
In addition, when the brake pad is excessively worn, the pressure loss of the wheel cylinder is excessively generated from the master cylinder, causing the brake pedal to be stepped down to its limit point, which causes a problem in that the operation feeling of the brake pedal is reduced.
Accordingly, the present invention has been made in view of the above situation, and when the brake pads are excessively worn, the disc cuts off the pressure supply to the wheel cylinder to improve the braking stability and prevent the deterioration of the operation feeling of the brake pedal. It is an object of the present invention to provide a brake pressure control device for a brake.
The present invention for achieving the above object, and a pressure sensor for sensing the pressure of each wheel cylinder and the master cylinder; When the pressure difference between each wheel cylinder and the master cylinder sensed by the pressure sensor is compared with a reference value, and the ABS brake is activated or not, the difference is greater than the reference value and the ABS brake is not operated. And a control unit for applying a control signal to the hydraulic unit to block the pressure supply to the wheel cylinder.
According to the brake pressure control device of the disc brake according to the present invention, a sensor for detecting the pressure inside each wheel cylinder and a sensor for detecting the pressure of the master cylinder is installed, the pressure of the master cylinder and each wheel cylinder via the sensor If the pressure difference is greater than a predetermined value after each pressure is detected, the brake pressure supply to the wheel cylinder is prevented to prevent the loss of the braking pressure, thereby degrading or operating the brake due to excessive wear of the brake pads. It is possible to prevent the inability to improve the braking performance, and to prevent the deterioration of the operation feeling of the brake pedal due to the loss of the braking pressure.
BEST MODE FOR CARRYING OUT THE INVENTION The present invention will now be described in detail with reference to the accompanying drawings.
2 shows the configuration of the brake pressure control device for the disc brake according to the present invention, that is, the caliper housing (1) is connected to the hydraulic unit (HU) for adjusting and supplying the hydraulic pressure, the caliper housing (1) The inside of the wheel cylinder (2) is formed so that the hydraulic pressure can be supplied from the caliper housing (1), the piston (3) to the reciprocating movement by receiving the hydraulic pressure through the wheel cylinder inside the wheel cylinder (2) A brake pad (5) is installed adjacent to the piston (3) for moving and receiving a pressing force of the piston (3) to bring it into close contact with the brake disc (4) to generate a braking force.
In addition, a
The hydraulic unit HU is connected to an output end of the control unit CU to supply or shut off the hydraulic pressure to the
The control unit (CU) can be configured separately, but can be replaced by programming a separate logic in the existing ABS control unit or ESC control unit.
According to the braking pressure control device of the present invention configured as described above, the control unit (CU) during the driving of the vehicle detects the pressure inside the wheel cylinder and the pressure inside the master cylinder via the pressure sensor (7) in real time After the pressure difference value is calculated, the difference value is compared with a predetermined reference value which is previously set. When the difference value is larger than the reference value, it is determined whether the ABS brake is operated.
When the difference value is larger than the reference value as described above and the ABS brake is determined to be inoperative, the control unit applies a control signal to the hydraulic unit to block the hydraulic supply to the wheel cylinder.
Therefore, when the pressure loss in the wheel cylinder is excessive due to excessive wear of the brake pad, the pressure supply to the wheel cylinder is cut off, thereby preventing a decrease in braking force or inability to brake due to pressure loss, thereby improving braking stability. In addition, it is possible to prevent the deterioration of the pedal operation feeling due to excessive stepping of the brake pedal, there is an advantage that can be conveniently applied as an additional function to the existing ABS system or ESC system.
1 is a block diagram of a disc brake according to the prior art,
2 is a block diagram of a braking pressure control device for a disc brake according to the present invention.
<Description of Symbols for Main Parts of Drawings>
1-caliper housing 2-wheel cylinder
3-piston 4-disc
5-brake pad 7-pressure sensor
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020090132473A KR20110075901A (en) | 2009-12-29 | 2009-12-29 | Braking pressure control method for disc brake system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020090132473A KR20110075901A (en) | 2009-12-29 | 2009-12-29 | Braking pressure control method for disc brake system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR20110075901A true KR20110075901A (en) | 2011-07-06 |
Family
ID=44915852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020090132473A KR20110075901A (en) | 2009-12-29 | 2009-12-29 | Braking pressure control method for disc brake system |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR20110075901A (en) |
-
2009
- 2009-12-29 KR KR1020090132473A patent/KR20110075901A/en not_active Application Discontinuation
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| Date | Code | Title | Description |
|---|---|---|---|
| WITN | Withdrawal due to no request for examination |